Slider for interlocking fasteners



June 1, 1937. 4 MacWILLjAMS 2,082,739

SLIDER FOR INTERLOCKING FASTENERS Filed June 14, 1954 Franz: m6 mzzmms; B Y

A TTORNEYS.

Patented June 1, 1937 PATENT OFFICE SLIDER FOR INTERLOCKING FASTENERS Frank MacWilliams, Philadelphia, Pa., assignor to Samuel Seltzer, Philadelphia, Pa.

Application June 14, 1934, Serial No. 730,609

7 Claims. (Cl. 24-205) This invention relates to slides for what are wherein metallic lugs along contiguous edging tapes are interengaged and disconnected through movement of the slides in opposite directions along the tapes; and it has reference to both the construction and assembling of such slides.

In the main, my invention is directed toward the provision of an improved interlocking slide whereof the component parts lend themselves readily to economic fabrication in quantity as punchings or die stampings from sheet metal; and which parts, by virtue of certain novel structural characteristics, and because of novel steps followed in assembling them, predetermine, with absolute accuracy, a neat, compact and ornamental product that can be relied upon for long service without causing excessive wear on the fastener elements or lugs.

Other objects and attendant advantages of this invention will be manifest from the following detailed description of the accompanying drawing, wherein Fig, I is an enlarged fragmentary view showing my novel slide in association with a conventional form of interlocking fastener.

Figs. II, III, IV and V are perspective views of the several die stamped sheet metal parts from which the slide is constructed; and,

Figs. VI, VII and VIII are views showing successive steps followed in assembling the slide.

With reference first to Fig. I of these illustrations, the numerals l and I l designate the edging tapes to which the opposing interlocking lugs l2 and 13 are permanently secured in the well known manner; while the numeral l4 comprehensively designates the slider of my invention. It is to be understood that the slider l4 functions in exactly the same manner as ordinary sliders, i. e. to interengage and disconnect the interlocking lugs l2 and I3 incident to being moved longitudinally of the edging tapes in and l I. As already pointed out hereinbefore, the present improvements are more especially concerned with the formation and assembling of the die stamped sheet metal parts which enter into the construction of my novel slider, said parts being separately illustrated and identified respectively by the numerals i5, i6, i1 and iii in Figs. II-VIII.

The parts l5 and i6 are identical in shape and size and constitute what may be conveniently termed the face components of the slider. As shown, the components |5-and l6 have a configuration resembling that of a shield with a fiat back l9 that is convergent downwardly and which is bounded by concave side edges with convex top and bottom edges 22 and 2i, said side edges being provided with flanges 23 in perpendicular relation to the back I9. Each face component l5, I6 is furthermore provided with a square notch 25 centrally of its top convexed edge 22 5 and a square aperture 24 medially of its back IS. The components l5 and i6 may be formed in a single operation, or they may be blanked, and the flanges 23 turned up by a separate upsetting operation if desired.

The part II, which I will refer to hereinafter as the connecting component, has an irregular configuration with an elongate horizontal medial portion 26 and end extremities 21 and 28 which are inclined outwardly and upwardly from said medial portion at acute angles. At the juncture between the extremity 21 with the medial portion 23, the component I I is well rounded as at 29 with provision of a semi-circular notch 30 at the crotch of the angle. Substantially at the center, the 20 main portion 26 of the connecting component I! has an upstanding tongue or projection 3| which is recessed in its top as at 32, and which, at one side, is separated from the semicircular notch 30 by an intervening notch 33. There is also a well 25 defined notch 34 between the right side of the projection 3| and the sloping inner edge 35 of the extremity 28 of the connecting component ll. Adjacent their ends 36 and 31, the extremities 2i and 28 are respectively formed with inwardly-directed rectangular-section rivet projections 33 and 40.

The part l8 illustrated in Fig. V is perfectly flat and designed to serve as a pivoted finger grasp for the slider l4. As shown, the upper and lower portions 4i and 42 of the finger grasp 18 are divergent with respect to a narrower central waist portion 43, the upper portion 4| being bifurcated and the extremities 44 of the bifurcation formed respectively with inwardly-directed terminal pivot projections 45; while the lower portion 42 is provided with a circular aperture 46 at the center.

The slider i4 is assembled by first arranging the face components I5 and IS with their broader ends uppermost and their side flanges 23 facing toward each other as in Fig. VI, then engaging their upper edge notches 25 respectively with the notches 33 and 34 of the connecting component, and then swinging them outward so that their apertures 24 receive the rivet projec- 50 tions 39 and 40 on the'extremities 21 and 28 of the connecting component l'l. With this accomplished the projections 33 and 40 are'then peened or headed over as at 41 and 48 to permanently secure the face components I5 and I6 to the connecting component [1, whereupon the latter is' bent to U-configuration to bring said face components inte. parallel relation as shown in Fig. VII with their inner sides abutting the projection 3| of the connecting component I1 and with their top portions'flrmly clinched by incidental closing up of the notches 33 and 34 of said connecting component. It is to be par ticularly noted that the projection 3| of the connecting component 11 accurately determines a definite interval between the curved edge flanges 23 respectively of the face components l5 and it, so that the slide may move freely over the interlocking lugs I2 and i3 (Fig. I) on the edging tapes Ill and II, with said flanges lapping the outer ends of said lugs. After bending of the connecting component I! as just explained, the recess 32 in the upper end of the projection 3! is shaped, by means of a suitable tool, to semicircular configuration as shown in dotted lines at 49 in Fig. VII, for capacity to cooperate smoothly with the interlocking lugs i2 and it. Finally, the finger grasp I8 is brought up as shown in Fig. VIII and its extremities 44 pressed toward each other, as indicated in dotted lines, to engage the pivot lugs with the eye 50 (Fig. VII) jointly formed by the outer side of the face component l5 and the notch 30 of the connecting component it.

As a consequence of the described novel construction and assembling of the parts i5i8, it will be seen that there is afforded an interlocking slider which is neat, compact and ornamental in appearance, which is secure against the possibility of detachment or displacement of its component parts, and which can be relied upon for long service without occasioning excessive wear of the interlocking lugs.

Having thus described my invention, I claim:

1. A slider for interlocking fasteners comprising a pair of opposedly-disposed face components having inwardly-directed guide flanges, and a bifurcate connecting component embodying extremities for sustaining the side components and having notches at opposite sides of a spacer projection, within the crotch thereof, in which the transverse confronting edges of the side components are fixedly held by a clinch grip.

2. A slider for interlocking fasteners according to claim 1, wherein registering transverse edges of the face components are formed with notches for interlocking engagement with the crotch notches of the bifurcate connecting component.

3. A slider for interlocking fasteners according to claim 1 wherein the face components are permanently secured at a medial pointto the exnotches of the connecting component, and the extremities of the latten component have square rivet projections for peened fixture in correspondingly-configured apertures medially of the first mentioned components.

6. A slider for interlocking fasteners according to claim 1, including a finger grasp with a split loop-pivotally engaged in an eye jointly provided by an inner edge notch in one of the connecting component extremities and the confronting portion of the attached face component.

7. A slider for interlocking fasteners comprising opposed shield-like face components each embodying transverse convex edges withinterveningconcave side flanges and a medially-located rectangular orifice, one of the convex edges of each said face component having a centrally located rectangular notch; a connecting component including a medial portion with relatively projection centrally of the connecting component 

